Massage knife



FIG. 1 is a front top view of the of the massage knife showing my new design;

FIG. 2 is a rear bottom view of the claimed design of FIG. 1;

FIG. 3 is a top view of the claimed design of FIG. 1;

FIG. 4 is a left side view of the claimed design of FIG. 1;

FIG. 5 is a rear view of the claimed design of FIG. 1;

FIG. 6 is a front view of the claimed design of FIG. 1;

FIG. 7 is a bottom view of the claimed design of FIG. 1; and,

FIG. 8 is a right side view of the claimed design of FIG. 1. 

CLAIM I claim the ornamental design for a massage knife, as shown and described. 